US2823609A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for seismic prospecting
Assignee: EIDP Inc
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Filing: 1956-05-24
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Granted: 1958-02-18
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Expires: 1976-05-24
Abstract
No abstract record available.
Inventors
- 👤 Johnson Norman Gardner
- 👤 Noddin George Adelbert
- 👤 Swanson Merrill Edward
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:57
CPC Classifications
G; G01; G01V; G01V1/00; G01V1/02; G01V1/104; G01V1/13; F; F42; F42D; F42D1/00; F42D1/04; F42D1/06; G01V1/04; G01V1/06; G01V1/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
80 words
A DELAY CONNECTOR FOR CONNECTING TWO LENGTHS OF DETONATING FUSE WHICH COMPRISES A TUBULAR SHELL HAVING AN INNER DIAMETER SUBSTANTIALLY EQUAL TO THE OUTER DIAMETER OF DETONATING FUSE, AND CENTRALLY POSITIONED WITHIN SAID TUBULAR SHELL A DELAY-PRODUCING UNIT COMPRISING IN SEQUENCE, AN ENCLOSED EXPLOSIVE PRIMING CHARGE, AN ENCAPSULATED EXOTHERMIC NON-EXPLOSIVE MIXTURE, AN EMPTY LEAD TUBE, AN AIR GAP AND AN ENCLOSED HEAT-SENSITIVE DETONATING EXPLOSIVE COMPOSITION, SAID TUBULAR SHELL BEING OF GREATER LENGTH THAN THE LENGTH OF SAID DELAY PRODUCING UNIT.
Claim 2
Dependent Claim
80 words
A DELAY CONNECTOR FOR CONNECTING TWO LENGTHS OF DETONATING FUSE WHICH COMPRISES A TUBULAR SHELL HAVING AN INNER DIAMETER SUBSTANTIALLY EQUAL TO THE OUTER DIAMETER OF DETONATING FUSE, AND CENTRALLY POSITIONED WITHIN SAID TUBULAR SHELL A DELAY-PRODUCING UNIT COMPRISING IN SEQUENCE, AN ENCLOSED EXPLOSIVE PRIMING CHARGE, AN ENCAPSULATED EXOTHERMIC NON-EXPLOSIVE MIXTURE, AN EMPTY LEAD TUBE, AN AIR GAP AND AN ENCLOSED HEAT-SENSITIVE DETONATING EXPLOSIVE COMPOSITION, SAID TUBULAR SHELL BEING OF GREATER LENGTH THAN THE LENGTH OF SAID DELAY PRODUCING UNIT.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-02-17 | 1961-08-19 | 1962-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-02-17 | 1965-08-19 | 1966-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-02-17 | 1969-08-19 | 1970-02-18 | $7700.00 | Window Closed / Lapsed |